Automatic muscle beating in the arm may involve the following factors: First, local muscle tissue injury and strain, due to local congestion, edema, and inflammatory response stimulation, resulting in muscle dysfunction and involuntary beating. Secondly, the muscle dysfunction caused by local hypoxia and ischemia, such as local vascular pressure, cold or vasculitis, leads to involuntary muscle throbbing. Third, nerve problems, such as cervical spondylosis resulting in compression of the nerve roots of the upper limbs, can easily lead to abnormal neuromuscular function after the nerve problems, resulting in voluntary muscle throbbing. Fourth, local muscle throbbing can also occur under the effect of factors such as calcium deficiency, mental tension and poor sleep. It is recommended that patients go to the hospital for consultation to clarify the diagnosis.